Question: What is the chemical compound with the lowest IDLH whose has part is nitrogen?
Paraphrase: What chemical compound has the lowest IDLH and which part is nitrogen?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q11173 . ?ent wdt:P2129 ?obj . ?ent wdt:P527 wd:Q627} ORDER BY ASC(?obj)LIMIT 5 
Answer: paraquat dichloride, HN-1, O-chlorobenzylidenemalononitrile, strychnine, diazomethane